diff -r 3a1aef73b2b2 -r aea5d7fa7ef5 doc-src/IsarImplementation/Thy/unused.thy
--- a/doc-src/IsarImplementation/Thy/unused.thy	Wed Mar 04 11:05:02 2009 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,79 +0,0 @@
-
-section {* Sessions and document preparation *}
-
-section {* Structured output *}
-
-subsection {* Pretty printing *}
-
-text FIXME
-
-subsection {* Output channels *}
-
-text FIXME
-
-subsection {* Print modes \label{sec:print-mode} *}
-
-text FIXME
-
-text {*
-
-
-  \medskip The general concept supports block-structured reasoning
-  nicely, with arbitrary mechanisms for introducing local assumptions.
-  The common reasoning pattern is as follows:
-
-  \medskip
-  \begin{tabular}{l}
-  @{text "add_assms e\<^isub>1 A\<^isub>1"} \\
-  @{text "\<dots>"} \\
-  @{text "add_assms e\<^isub>n A\<^isub>n"} \\
-  @{text "export"} \\
-  \end{tabular}
-  \medskip
-
-  \noindent The final @{text "export"} will turn any fact @{text
-  "A\<^isub>1, \<dots>, A\<^isub>n \<turnstile> B"} into some @{text "\<turnstile> B'"}, by
-  applying the export rules @{text "e\<^isub>1, \<dots>, e\<^isub>n"}
-  inside-out.
-  
-
-  A \emph{fixed variable} acts like a local constant in the current
-  context, representing some simple type @{text "\<alpha>"}, or some value
-  @{text "x: \<tau>"} (for a fixed type expression @{text "\<tau>"}).  A
-  \emph{schematic variable} acts like a placeholder for arbitrary
-  elements, similar to outermost quantification.  The division between
-  fixed and schematic variables tells which abstract entities are
-  inside and outside the current context.
-
-
-  @{index_ML Variable.trade: "Proof.context -> (thm list -> thm list) -> thm list -> thm list"} \\
-
-
-
-  \item @{ML Variable.trade} composes @{ML Variable.import} and @{ML
-  Variable.export}, i.e.\ it provides a view on facts with all
-  variables being fixed in the current context.
-
-
-  In practice, super-contexts emerge either by merging existing ones,
-  or by adding explicit declarations.  For example, new theories are
-  usually derived by importing existing theories from the library
-  @{text "\<Theta> = \<Theta>\<^sub>1 + \<dots> + \<Theta>\<^isub>n"}, or 
-
-
-
-  The Isar toplevel works differently for interactive developments
-  vs.\ batch processing of theory sources.  For example, diagnostic
-  commands produce a warning batch mode, because they are considered
-  alien to the final theory document being produced eventually.
-  Moreover, full @{text undo} with intermediate checkpoints to protect
-  against destroying theories accidentally are limited to interactive
-  mode.  In batch mode there is only a single strictly linear stream
-  of potentially desctructive theory transformations.
-
-  \item @{ML Toplevel.empty} is an empty transition; the Isar command
-  dispatcher internally applies @{ML Toplevel.name} (for the command)
-  name and @{ML Toplevel.position} for the source position.
-
-*}
-